SRPE管-混凝土-钢双壁空心短柱轴压性能试验研究  

Axial compressive behavior of SRPE tube-concrete-steel double-skin stub column

作　　者：俞鑫苹 高剑平[1] 郝提 曹忠民[1] 刘洪 YU Xinping;GAO Jianping;HAO Ti;CAO Zhongmin;LIU Hong(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China;Anyuan Pipelines Industrial Co.,Ltd.,Pingxiang 337000,China)

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013 [2]安源管道实业股份有限公司,江西萍乡337000

出　　处：《混凝土》2024年第1期39-44,共6页Concrete

基　　金：国家自然科学基金(52268025)。

摘　　要：针对西部盐渍土地区钢筋混凝土桥柱的腐蚀问题,提出“SRPE管-混凝土-钢双壁空心柱”。为研究其轴心受压力学性能,设计制作了6根SRPE管-混凝土-钢双壁空心短柱并进行轴压试验,获得了试件的破坏形态和荷载-位移曲线,进而分析了SRPE管压力等级、空心率和钢管径厚比对试件轴心受压力学性能的影响规律。研究结果表明:试件的破坏形态为中下部剪切破坏;试件极限承载力随SRPE管压力等级提高而增大,随空心率和钢管径厚比增大而减小,且空心率影响大于钢管径厚比。最后给出了SRPE管-混凝土-钢双壁空心短柱的轴心受压承载力计算式,计算结果与试验值吻合良好。The reinforced concrete(RC)bridge columns located in saline soil area in western China are sufferring from corrosion attack,therefore,a new type of composite structure is proposed,which is herein referred to as SRPE tube-concrete-steel double-skin column.Six SRPE tube-concrete-steel double-skin stubs were tested to study their axial compressive behavior,and the failure pattern and axial load-displacement curves of specimens were obtained.The influence of pressure grade of SRPE tube,hollow rate and diameter-thickness ratio of inner steel tube on the axial compression behavior of the specimens were analyzed.The experimental results show that the failure pattern of specimen is oblique shear failure in the middle and lower part of the specimen.The ultimate bearing capacity of specimens increases with the increase of the pressure grade of SRPE pipe,and decreases with the increase of hollow ratio and diameter-thickness ratio of inner steel tube,and the influence of the hollow ratio is greater than the diameter-thickness ratio of inner steel tube.The predicted results of ultimate bearing capacity using the calculation formula proposed agree well with the mesured results.

关 键 词：钢骨架聚乙烯塑料复合管 约束混凝土 钢管 组合结构 轴压性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]